and i think that's going to be a powerful moment for mitt romney. >> reporter: and an adviser for romney says they're preparing for romney to come armed. >> they've been practicing zingers for months. >> reporter: abc news political analyst matt dowd says at this point, romney and obama advisers are style over substance. >> the debates that have changed people's minds have all been about physical characteristics and mannerisms really in the modern age and not substance or policy issues. >> reporter: both have challenges. the president needs to keep his answers short to avoid sounding like the professor he was before the white house. and romney must come across relatable and really connect with the voters. karen travers, abc news, washington. >> hmm. >> all right. >> talking about the whole style not substance? >> style. style is important. and particularly just likability, what people feel like they -- you know, they feel like they have a comfort zone with you. it's very important. >> i don't think anybody has prepared more so than mitt romney. you've got 50 million to 60 million eye bal